What has made the major Spiritists’ organization intractable and perhaps unable to accept the fact that Karl Mollison was once Allan Kardec?

This is a question of building trust, greater awareness, and by enough of the membership who are open enough and uncorrupted to evaluate the available evidence in a serious way, and who are capable of seeing the truth here. We do not wish to single out anyone for criticism. Each human being is a quite complex composite of differing knowledge, beliefs, and many other characteristics. The fact they might share membership in an organization like the Spiritists does not mean all will have a similar reaction to any particular circumstance. So the same concern could be leveled at people within any particular locale or people within any other group, or sharing a common perspective, such as a religious affiliation. You will find many within any philosophical or spiritual cohort who will not be open to the ideas of GetWisdom that Karl is bringing forward. Even though it is divine wisdom and has our backing, and we do endeavor to encourage the viewer or listener or reader exposed to the knowledge that has accumulated to give it a fair hearing, there will be many who are resistant and whose minds might be quite closed so they are, in effect, unreachable with any views differing from their own. This is simply the reality of the world you inhabit, that it is so heavily corrupted and constrained, and this is true of all people at all levels of knowledge, awareness, and interests in the paranormal, the spiritual, or the more esoteric explorations of many using their intuitive abilities and carving out a niche to define what they learn and attempt to interest others. There is quite a chorus of differing views because people are focused on many different aspects of the life experience and the many phenomena involved, very much akin to the story of The Blind Men and the Elephant—all are seeing truth but not necessarily enough and in the right perspective to discern the outlines of the whole that would help to explain many differing perspectives and insights about the meaning of existence and what people are experiencing. So we do not see this as a simple yes or no having been decided at this juncture. You are just getting started here with your outreach and it is that outreach and the ability to communicate that will ultimately win the day with many, many people in many, many differing groups with widely differing perspectives at the current time.